High-Performance Synthetic Waxes for a Sustainable Packaging Ecosystem

Packaging Papers commonly incorporate paraffin waxes to meet the requirements of water and oil resistance. However, such wax-coated paper is difficult to recycle and also has a lower biodegradation rate. The aim of this study is to develop biobased waxes that provide necessary packaging functions while also retaining biodegradation and repulping capabilities at the end of their use. This study demonstrates the synthesis and performance evaluation of biobased and biodegradable synthetic waxes with the potential for repulpability. The biodegradation and repulping of these waxes are ensured by incorporating lactic/glycolic linkages into their structure. The obtained waxes are applied onto kraft paper, and the resulting coated paper is evaluated for its thermal, mechanical, and water/oil resistance. In addition, the synthetic waxes were also added to a few percent of natural waxes and evaluated for their better performance. Furthermore, the degradability of the waxes is also evaluated under mildly alkaline conditions to assess their suitability for repulping. This work will not only enhance green packaging but also meet green chemistry principles, such as waste prevention (no microplastics), the promotion of renewable feedstocks, and the design of biodegradable packaging.